/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.explorer.ui.reports;

import com.vaadin.ui.Component;
import com.vaadin.ui.Label;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.Reindeer;
import org.dussan.vaadin.dcharts.DCharts;

/**
 * @author Joram Barrez
 */
public class ChartComponent extends VerticalLayout {

    private static final long serialVersionUID = 1L;

    public ChartComponent(String title) {

        if (title != null) {
            Label label = new Label(title);
            label.addStyleName(Reindeer.LABEL_H2);
            addComponent(label);
        }

    }

    public void addChart(String description, Component chart, String errorMessage) {

        addComponent(new Label("&nbsp;", Label.CONTENT_XHTML));
        addComponent(new Label("&nbsp;", Label.CONTENT_XHTML));

        // Description
        if (description != null) {
            Label label = new Label(description);
            label.addStyleName(Reindeer.LABEL_H2);
            addComponent(label);

            addComponent(new Label("&nbsp;", Label.CONTENT_XHTML));
        }

        // Chart
        if (chart != null) {
            if (chart instanceof DCharts) {
                // DCharts doesn't know how to size itself
                chart.setWidth(600, UNITS_PIXELS);
                chart.setHeight(450, UNITS_PIXELS);
                ((DCharts) chart).show();
            }
            addComponent(chart);
        }

        // Error message
        if (errorMessage != null) {
            Label errorLabel = new Label(errorMessage);
            addComponent(errorLabel);
        }
    }

}
